Syrup pump



Dec. 16, 1930. D. c. sErrz 1,784,977

SYRUP PUMP Filed Feb. 5. 1929 2 Sheets-Sheet l INVENTOR F1 E. Dm/vCJE/Tz ATTORNE D. C. SEITZ SYRUP PUMP Dec. 16, .1930.

Filed Feb. 5, 1929 2 Sheets-Sheet 2 INVENTOR DEHN C. 55/72 BY gmaw Y C ATTORNEYSC 7 P atented Dec. 16, 1930 "is E.

E T ES PATENr oi-"rice.

DEAN C. SEITZ, OE CLEVELAND, OHIO, ASSIGNOR TO THE RUSS MANUFACTURING COM PANY, CLEVELAND, OHIO, .A COBBORATION OF OHIO SYRUP PUMP Applicationfiled February 5, .1929, Serial No. 337,694.'

This invention relates to pumps for'dis pensing liquids from jars, and particularly to pumps used in ccnnectionwith sodayfountainsa The principal object ofthe present invention isto provide a syrup pump of novel and simplified construction, which is neat in appearance and economical-to manufacture.

Another object is to providea pump for 1Q dispensing syrups and the like which may be easily operated without tiring the op; erator.

Another object is to providea pump for dispensing syrupsand the like with an operating lever having'suflicientleverage torender the same easily operatable whilethick lever handle having rolling contact with the plunger rod thereof, the tangent at the point of contact of the handle with the plunger rod being substantially perpendicular to the axis of the plunger rod tominimize friction,so that thick syrups maybe dispensed with a minimum efiort on the part of the operator.

These being among the-objects of the present invention, the same consists of certain features of construction and combinations of parts to be hereinafter described withreference to the accompanying drawings and then claimed, having the aboveand other objects in view.

Heretofore pumps of the class used for dispensin syrups and the like, have been proposed which were operatedby direct pressure on a spring pressed plunger. Thick syrups, such as chocolate and the like, are usually maintained at a comparatively low temperature, and as a result they will flow only when subjected to considerable pressure. It has been found from observations that the soda fountain operator during rush periods often became very tired, because of the diflicult operation of the directly operated pumps when dispensing heavy syrups, such as chocolate and the like. Quite frequently the operators hands would blister, and his wrists Wouldfswell from continuous operation of the syrup pumps, thereby causing considerable pain.

Other pumps have been proposed which were'operated by lever handles disposed at one side of the discharge spouts. These pumps, however, were awkward to operate because of their'closeness to the spouts of adjacent pumps, and were unsightly because they were not symmetrical in design and did not blend in with the design of other-parts of the'soda v fountain;

Figure 1 isa longitudinal. section taken through a syrup pump showing the general construction of the same. x

Fig. 2 is a plan View of the pumpshown in Fig. 1, showing thesymmet-rical arrangement of the exposed parts thereof.

Fig. Bis an enlarged 'sectio'n'of the upper portion ofthe pumpshowingthe operating handle, and its connection with the pump plunger rod. T

Fig. .lis a transverse section taken on the line 4l of Fig. 3.

i Fig. 5 is a fragmentary perspective viewof the operating lever showing the cam surface formed integral therew th. v

F 1g. 6 1s a dlagrammatic view showing the contact between the lever cam surface and the rollerpositloned on the pump plunger rod. I

Referring to the accompanying drawings in which" like numerals refer. to like parts throughout the several views, the pump chosenfor illustration is adapted to be positioned in a jar 10 which contains the syrup 12' and 13.

with a flanged cover plate 11 adapted to lit.

over the, top of the jar 10 upon which the pump equipment is mounted. 'The pump cylinder and valve mechanism is supported from the cover plate 11 by tubularmembers One end of the supporting member 12 is suitably connected to the cover plate 11 and the other endof the same is secured in a lug 14 formed at one side of the pump housing 15. he tubular member 13 constitutes a delivery tube for conveying syrup from the pump to the discharge spout 16 which is secured to the top ofthe cover plate 11. The upper end of the delivery tube 13 preferably telescopes with the discharge spout 16 and is securely held therein... The

other end of the deliverytube 13 is received by and secured within aJtubular passagew 17 formed in'the pump housing 15. Thetubular members 12. and 13 therefore provide a rigid support for connecting the pump mechanism with the cover plate 11; V i

The housing 15 is provided with a'disc valve 18 mounted in an opening in its base v to control the flow of syrup from thejar 10 into the pump cylinder 21 formed within' 'the housing'lo. The pump cylinder 21 is'connec'ted by means of the port'19with the pas sageway 1? so thatsyrup may be forced thereinto from the cylinder 21 on thegdo-wnward stroke ,of the pump mechanism.

the lower end of aplunger rod The up- 7 per end ofthe rod 22 is secured to the lower end of an upper'plunger rod23 extending through a spring housing 24, which plunger rod 23 has a recessed member 25 threadedonto its upper end that has sliding contact with the walls of the housing 24.' The upper plunger rod 23 is preferably squarein cross section and is held against rotation by the square opening'40 formed in a bracket 22' attached to the cover plate 11. The lower end of the rod 23 is formed to a cylindrical shape and formed with threads so that it can be threaded into an internally threaded collar 41 secured tothe upper end of the lower rod 22. The spring housing 24 is supported within the bracket 27. A compression'sprin g 26 surrounds the rod 23 and its ends abut against an annular plug 39 threaded intothie bottom ofthe housing 24, and against the bottom of the recess formedin the member 25 so that the compression pressure of the same will normally hold the plunger 20 at its uppermost position in the pump cylinder The pump ju'st described has been-chosen for illustration and explanation as one form of pump to which the present invention,

which is about to be described, is adaptable,

and it is to be understood that this invention push'rod 29 is 'slidably positioned in the bracket 27 parallel to the axis of the lower and upper plunger rods 22 and 23, and in the same vertical plane as the spout 16, the member25 and arm 28, 'as "illustrated in Fig. 2.

Asshown in 3, thei'lower end of the push rod 29 is positioned belowthe cover plate 11 andis secured by anut 44 to an arm 30whic'h is mounted'on the cylindrical end of the upper plunger rod 23 between the shoulder of the plunger rod 23 and the collar 41, and normally abuts against the bracket 27 to prevent withdrawal ofthe plunger 20 from the pump cylinder 21. The upper end of the push rod 29 is bifurcated and carries a pin 32 between its legs 33fupon which a roller 31 is mounted. -The top surface of the roller of the legs 33 substantially as shown in Fig. 4.

A- cha-nnelecllever 34 is pivoted by means of a pin 35 to the end of the bracket arm 28 andiis formed with a cam 36 intermediate its sideiflangesf The metal of thelever 34 connecting the" side flanges thereof preferably extends beyond the pivotpin 35 so that an z-abutment 42 is provided which engages the bracket arm 28 when the lever is in its nor- A plunger 20 having a'freeworking -'within the pumping cylinder 21 is carried at mal uppermost position to prevent the lever frombein'g pivoted to an inoperative position. T-he cam 36 is adapted to engage the roller 31 and is positioned between the legs 33 of the iuaper end of the push rod 29 so that it is guided thereby. The face of'the cam 36 is preferably designed in such a manner as shown in Fig. 6, so that regardless of the pivoted position of the/lever 34, the point of contact with the roller 31 is slightly in advance of the longitudinal axis of the push which would tend to bind the same in the bracket 27.. In some. instances, however, it

may be desirable that the point of contact of the cam 36 with the roller 31 be coincident with the .a'Xi'sof the push rod 29. It might be said that the cam surface is designed so that a tangent 'T to theicam surface at the point of contact'with the roller 31 will be constant for all pivoted'positions of the lever. 34, as shown by the two positions A. and B, and that the angle of the tangent to the longitudinal axis 0 of the push rod 29 may vary between the limits of zero and three or :is also adaptable for use with many other i 31 is preferably positioned below the tops tion with the tangent to the'cam at the point of contact of the cam and roller, is to include manufacturing tolerances' In other words,

it is to be understood that when the tangent.

to the cam surface at the contact point is spoken of as being substantially perpendicular to the axis of the push rod, it may lie at any angle coming withinreasonable manufacturing tolerances. By way. ofexplanation, the openings in both the handle 34 and bracket28 may be'shifted a slight'amount from their correct predetermined position by an inadverent m splacement' or shifting of the bracket or handle inthe fixtures or jigs when the openings" are drilled oi-iformed,

Manufacturing tolerances, inpractice, are

prescribed to compensate, for these conditionsp I I,

As shown in Figs. 1, 2 and 3, the lever 34 is formed with an opening 37 near its freeend, intowhich a plate 38bearing the name of the syrup tobe dispensed, may bepositioned and held therein bya threaded cap 43.

In operation, the "sod a fountain operator pushes downwardlyon the end of the lever 34 which by reason of the contact between its cam 36 and the roller 31 actuates the. push rod 29, to move the plunger 20 to exert pres sure against the syrup containedwithin the pump cylinder 21. The syrup is forced through the port 19 into the passageway 17, and thencejthrough the discharge tube13 into the spout 16 where it is discharged at, the mouth of the same. 1V hen the plunger 20 reaches the bottom of its stroke the operator removes his hand from the lever 34, and the spring 26'which has been compressed during the down stroke causes the plunger to return to its normal position tocreate a suction to raise the valve 18 from its seat and draw syrup into the pump cylinder 21.

The push rod 29 being rigidly secured to the arm 30 which is securely held between the collar 41 and shoulder of the upper plunger rod 23 is held against rotation so that the correct position of the cam 36 will always be maintained between the sides 33 of the bifurcated end of the push rod 29.

The pump operating mechanism just described provides a construction wherein con siderable leverage is provided and wherein friction is reduced to a minimum by the use of the cam 36 and roller 31. It can beseen thatfimany disadvantages present in syrup pumps used heretofore may be practically eliminated by incorporating the operating mechanism of the present invention. 7 It is apparent that the thickest syrups, which are the most difficult to dispense,"1nay be easily dispensed without tiring the soda fountain operator, because of'the improved operating mechanism described. I v v It is further apparent that a construction is provided whichfis symmert'icalin. design and consequently heat in appearance because,

'ira'ctically all operating parts are concealed by the lever, 34 01 the cover plate 11 when the pump'isin position in the jar 10 "The side fianges -of the lever 34 conceal the roller Slycam 36, and the upper 'end of the push rod 29, and the cover plate ll'conceals the connection between the lower end of the push rod 29 with the actuating rod 23.

' *Furthermore, it is to be understood that the apparatus'shown and described, and the particular procedure set f0rth,'are presented for purposes'pf explanation and illustration and that various modifications-offsaid apparatusand procedure can be made without departing from" the spirit and substance of the broad invention, the scope of which is commensurate with the appended claims.

a 1. In a syrup dispensing pump, a plunger, a plunger rodconne'cted thereto, 'apu'sh' rod offset from and rigidi-ly connected to said rod, and a hinged operating lever havingunrod for actuating'said plungeri 2. asyrup dispensing pump, a plunger, a plunger rod connected thereto, a push rod parallel tosaid rod and rigidilyconnected therewith for simultaneous longitudinal movement in the, same direction, and a hinged operating lever having a cam surface thereon in unconnected engagement with said push rod, whereby movement of said lever causes said cam surface to depress said push rod for actuating said plunger. V r i 3. In a syrup dispensing pump, a plunger, a plunger rod, a push rod connected to said rod' in parallel offset relationship to simultaneously move therewith in the same direction for actuating said plunger, a hinged opconnected sliding engagement with said push Y erating'lever, and a curved cam 011 said lever stantially perpendicular to the longitudinal, axis of saidpush rod for all positions of said leverand push rod; I i 4. In a syrup dlspenslng pump, a plunger,

a plunger rod, a push rod rigidlyconnected to said rod in parallel offset relationship to simultaneously movetherewith for actuating SELICl plunger, roller mounted on said push rod. perpendicular to the axis thereof, and

a pivoted operating lever having acam surpush rod at a facethereon.contactingwith said roller, the tangent to said camsurface at the point of contact with said rollerbeing substantially perpendicular to the axis of said push rod for al pivoted positions of said lever. v

I, 5. The combination with a syrup dispensing pump having a plunger rod connected with a plunger, of a push rodrigidly connected to said rod in ofiset relationship for simultaneous longitudinal movement in the same direction, and a pivoted lever-for actusaid rod in joffsetparallel relationship, said plunger rod and pushrod being simultaneously movable in the same dire'c'tion,a roller rotatably mounted on the end'ofsaid push rod, the axis thereofinters'ecting the axisof said push rod, a pivoted lever for actuating saidpush rod, and a cam surface carried by saidv levercontacting with said roller, the tangent to saide cam surface at the point of contact with said roller-being disposed substantially perpendicular tothe axis of said push rod for all pivoted operating positions of said lever. i

a. --7. The combination with a syrupdispensing pump having a longitudinally-movable rod connected with aplung'er, of a push rod parallelto and rigidly connected with said rod for simultaneous movement in the same direction, said rod being provided'with a bi-' furcated'end, a roller positioned between the sides of said bifurcated end transversely of the axis of said push rod, a pivoted lever for actuating said push rod to operate said plunger, and a cam surface carriedby said lever contacting with said roller substantially on the axis of said push rod whereby pivotal movementof said lever causes said cam surface'to move along said roller and depress said push rod.

8. The combination with a syrup dispensing pump having a longitudinally movable rod connected with a plunger, of apush rod parallel'to and connected with said rod for moving the same, a roller positioned on the end of said pushrrod transversely of the axis thereof, a downwardly presenting channelpush rod for allpivoted positions of said 1ever a 9. A syrup dispensing pump comprising a cover plate, pumping mechanism supported by said cover plate, a longitudinally movable rod connected with said pumping mechanism and guided in said cover plate, a bracket securedto said plate, a longitudinally movable push rod extending through said bracket and connected with saidrod below the surface of said plate, and a lever for actuating said push rod pivoted to said bracket, said leverbeing provided with a cam surface contacting with said push rod, whereby pivotal movement of said lever will causesaid cam surface to 1011 gitudinally movesaid-push rod for actuating said pumping mechanism. if s i -10. syrup pump comprising a cover plate, pumping mechanism supported by said cover plate, a bracket secured to the upper surfaceof said plate, a pump rod-connected with said'pumping mechanisma'nd extending through said bracket, rod guiding means carried by said-bracket, a push ro'd longitudinally movable in said bracket and connected with said pump shaft below said plate, a roller mounted in the endof said shaft extending above said plate, and a lever for actuating said push, rod having engagement with said roller so that movement of said lever against said roller longitudinally moves said push rod to operate said'pumping mechanism.

11. A syrup pump comprising a cover plate, pumping mechanism supported by said cover plate, a bracket secured to the upper surface of said plate, aplunger rod, rod guiding means carried by said bracket, an auxiliary push rodslidably carried by said bracket connected to said. plunger rod, a lever pivoted to said bracket and having cam engagement with the end of said push rod, and a discharge spout connected with said pumping 1nechaerating lever, rod guiding means and supporting bracket being disposed in the same vertical plane."

plunger, a thrust-transmitting portion car ried by said plunger rod, and a hinged 'operating ilever' having disconnected sliding engagement with said thrust-transmitting portion at a point offset from the axis of said rod forQactuating said plunger.

In testimony whereof I aflix my signature.

DEAN C. SEITZ.

'shapedpivoted lever for actuating said push ro d,and a cam surface integral with and positioned between the side flanges of said lever in V contacting relationship with said roller, the

tangent to said cam surface at the point of contact with said roller being disposed sub- 7 stantially perpendicular to the axis of said nism, the longitudinal axis of said spout, op- 

